国内外常用的空气分离方法 :吸附法是一种利用分子筛对不同分子的选择吸附

Air separation methods commonly used at home and abroad: <br>Adsorption is a technology that uses the selective adsorption performance of molecular sieves for different molecules to achieve the final separation goal. The technical process is simple, easy to operate, and low in operating cost, but it is difficult to obtain high-purity products. Moreover, the capacity of the device is limited, so this technology has its limited scope of application. The <br>membrane separation method uses membrane permeation technology, using the difference in the rate of oxygen and nitrogen through the membrane to achieve the rough separation of the two components. This method is simpler, easy to operate, and requires less investment, but the product can only reach 28% to 35% of oxygen-enriched air, and the scale is only suitable for small and medium-sized. It is only suitable for oxygen-rich combustion and <br>low-temperature application in medical and health care . It is a method that uses different boiling points of various components in the air, liquefies the air through a series of processes, and separates the different components through rectification. Compared with the first two methods, this method can achieve complete separation of air components, product purification, large-scale equipment, and dual-state (liquid and gaseous), so it occupies a dominant position in the industrialization of production equipment. Compared with the traditional separation, the separation of these gases needs to be achieved in a low temperature environment below 100K, so it is called the low temperature method (or cryogenic method).

Air separation methods commonly used at home and abroad:<br>Adsorption method is a technique that uses molecular sieve's selection adsorption performance to achieve the ultimate separation purpose, the process is simple, easy to operate, low operating cost, but it is difficult to obtain high purity products, and the device capacity is limited, so the technology has its limited application range.<br>Membrane separation method uses membrane penetration technology, using the different rate of oxygen and nitrogen through the membrane to achieve the coarse separation of the two components. This method device is simpler, easy to operate, small investment, but the product can only reach 28% to 35% oxygen-rich air, and the scale is only suitable for small-scale, only suitable for oxygen-rich combustion and health care applications<br>The cryogenic method is a method of using the different boiling points of each component in the air, liquefizing the air by a series of processes, and by distillation to achieve the separation of different components. This method can realize the complete separation of air components, the refinement of products, the large-scale of the device, the state of dualization (liquid and gaseous), so it occupies a dominant position in the industrialization of production equipment. Compared to conventional separation, the separation of these gases needs to be achieved at a low temperature below 100K, so it is called the cryogenic (or deep cooling method).

Common air separation methods at home and abroad:<br>Adsorption is a kind of technology which uses the selective adsorption performance of molecular sieve for different molecules to achieve the final separation purpose. The technical process is simple, easy to operate, low operating cost, but it is difficult to obtain high-purity products, and the device capacity is limited, so the technology has its limited application scope<br>Membrane separation method uses membrane permeation technology to realize the coarse separation of two components by using the different rate of oxygen and nitrogen passing through the membrane. This method is more simple, easy to operate and less investment, but the product can only reach 28% - 35% oxygen enriched air, and the scale is only suitable for small and medium-sized, only suitable for oxygen enriched combustion and medical and health care applications<br>Low temperature method is a method which uses the different boiling points of each component in the air to liquefy the air through a series of technological processes and achieve the separation of different components through distillation. Compared with the former two methods, this method can achieve complete separation of air components, refined purification of products, large-scale device and dual state (liquid and gas), so it plays a leading role in the industrialization of production device. Compared with the traditional separation, the separation of these gases can only be realized in the low temperature environment below 100k, so it is called low temperature method (or deep cooling method).<br>